Like mayor twin, Castro stands out

Lisa Krantz/San Antonio Express-News

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Congressional candidate Joaquin Castro, left, shakes hand with cameraman Dave Roberson as Castro arrives to be interviewed with his brother, Mayor Julian Castro, right, by CBS News National Correspondent Lee Cowan, far left, as they tape a segment for the CBS Evening News at Rosario's in San Antonio on Friday, August 24, 2012. The segment will air the night Castro gives the keynote speech at the Democratic National Convention,

Congressional candidate Joaquin Castro, left, shakes hand with cameraman Dave Roberson as Castro arrives to be interviewed with his brother, Mayor Julian Castro, right, by CBS News National Correspondent Lee Cowan, far left, as they tape a segment for the CBS Evening News at Rosario's in San Antonio on Friday, August 24, 2012. The segment will air the night Castro gives the keynote speech at the Democratic National Convention,